code: def __repr__(self):
      template = "asset: {asset}, amount: {amount}, cost_basis: {cost_basis}, \
  last_sale_price: {last_sale_price}"
      return template.format(
          asset=self.asset,
          amount=self.amount,
          cost_basis=self.cost_basis,
          last_sale_price=self.last_sale_price,
      )
  
file_path: zipline/zipline/finance/position.py
imports: from __future__ import division
  from math import copysign
  import numpy
  import logbook
  from zipline.assets import Future
  import zipline.protocol
label_desc: Use image node_id 9 for calling the Position obj's underlying member method code with example usage: obj.__repr__() and returns: template